Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Portland → Dulles via Denver: arrives on time 79%
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05:00 PDX → 08:31 DENUA 459 · United · 2h 31m · 97% on time, 0.3% cancelled
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1h 49m layover in Denver (DEN) · 45 min minimum on one ticket
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10:20 DEN → 15:53 IADUA 2087 · United · 3h 33m · 81% on time, 0.9% cancelled
Total trip 7h 53m, scheduled departure to arrival (Dulles is 3 h ahead of Portland). Times are local. Both flew on 56 of the last 56 days.
Makes the connection99%The first flight arrived more than 64 minutes late on 1% of the days it flew: too late for the 45-minute minimum connection on a 1h 49m layover.
Arrives on time79%First flight not cancelled (0.3% are) × connection made (99%) × second flight not cancelled (0.9% are) and within 15 minutes (81%).
Total trip7h 53mPDX 05:00 to IAD 15:53, layover included
Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.